Stars seen in outwardly grotesque car (6)
I believe the answer is:
gemini
'stars' is the definition.
(constellation)
'outwardly grotesque car' is the wordplay.
'outwardly' means to remove the middle letters (only the outermost letters are used).
'car' becomes 'mini' (Mini Cooper).
'grotesque' with its middle removed is 'ge'.
'ge'+'mini'='GEMINI'
'seen in' is the link.
(Other definitions for gemini that I've seen before include "Third sign of the Zodiac" , "lot of stars" , "Zodiac sign - the Twins" , "Castor and Pollux constellation" , "Heavenly sign of the Twins" .)